| .. _zephyr_release_notes: | 
 |  | 
 | Release Notes | 
 | ############# | 
 |  | 
 | Zephyr project is provided as source code and build scripts for different | 
 | target architectures and configurations, and not as a binary image. Updated | 
 | versions of the Zephyr project are released approximately every three-months. | 
 |  | 
 | All Zephyr project source code is maintained in a `GitHub repository`_. | 
 |  | 
 | For Zephyr versions up to 1.13, you can either download source as a tar.gz file | 
 | (see the bottom of the `GitHub tagged releases`_ page corresponding to each | 
 | release), or clone the GitHub repository. | 
 |  | 
 | With the introduction of the :ref:`west` tool after the release of Zephyr 1.13, | 
 | it is no longer recommended to download or clone the source code manually. | 
 | Instead we recommend you follow the instructions in :ref:`get_the_code` to do | 
 | so with the help of west. | 
 |  | 
 | The project's technical documentation is also tagged to correspond with a | 
 | specific release and can be found at https://docs.zephyrproject.org/. | 
 |  | 
 | .. comment We need to split the globbing of release notes to get the | 
 |    single-digit and double-digit subversions sorted correctly.  Specify | 
 |    names in normal order and use the :reversed: option to reverse it. | 
 |    This will get us through 10 subversions (0-9) before we need to | 
 |    update this list for two-digit subversions again. | 
 |  | 
 | .. toctree:: | 
 |    :maxdepth: 1 | 
 |    :glob: | 
 |    :reversed: | 
 |  | 
 |    release-notes-1.? | 
 |    release-notes-1.* | 
 |    release-notes-* | 
 |  | 
 | .. _`GitHub repository`: https://github.com/zephyrproject-rtos/zephyr | 
 | .. _`GitHub tagged releases`: https://github.com/zephyrproject-rtos/zephyr/tags |